Protective case for a watch



FIG. 1 is a perspective view of a protective case for a watch showing my new design;

FIG. 2 is another perspective view thereof;

FIG. 3 is a front elevational view thereof;

FIG. 4 is a rear elevational view thereof;

FIG. 5 is a left side elevational view thereof;

FIG. 6 is a right side elevational view thereof;

FIG. 7 is a top plan view thereof;

FIG. 8 is a bottom plan view thereof; and,

FIG. 9 is a cross-sectional view thereof taken along line 9-9 of FIG. 3. 

CLAIM The ornamental design for a protective case for a watch, as shown and described. 